A UNESCO World Heritage site, the Temple of Apollo Epicurius pays homage to Apollo, the god of healing, prophecy, the sun, and music. It's an important attraction, built between 420 to 400 B.C.E., mainly from local gray limestone and marble, on the site of an even older temple in the Arcadian mountains. The locals believed it was Apollo who saved them from the plague, so they dedicated this temple to him. Additionally, it is the oldest surviving temple that blends Doric, Ionian, and Corinthian architecture. The temple features visually striking elements, like imposing columns and a height of 1,130 meters (3,707 feet).